<!doctype html>
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<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<script type="text/javascript">
var num={
	age:'eidn',
	name:'don',

};
// num.size='av';
// alert(num.size);
delete num.name;
alert(num.name);
	





</script>




<body>
	
</body>
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